apimock 5.18.0

use std::{path::Path, process::Command};

use hyper::StatusCode;
use serde_json::json;
use util::{
    http::{test_request::TestRequest, test_response::response_body_str},
    test_setup::TestSetup,
};

#[path = "util.rs"]
mod util;

/// A real, shipped example config - used as the "normal workspace"
/// case for RFC 049's `--version` / `--help` evidence requirement.
fn normal_workspace_dir() -> std::path::PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR")).join("examples/config/default")
}

fn bin() -> Command {
    Command::new(env!("CARGO_BIN_EXE_apimock"))
}

#[tokio::test]
async fn port_env_arg_overwrites() {
    let port = u16::MAX;
    let test_setup = TestSetup {
        port: Some(port),
        ..Default::default()
    };
    let _ = test_setup.launch().await;

    let response = TestRequest::default("/", port).send().await;

    assert_eq!(response.status(), StatusCode::OK);

    assert_eq!(
        response.headers().get("content-type").unwrap(),
        "application/json"
    );

    let body_str = response_body_str(response).await;
    assert_eq!(body_str.as_str(), json!({"hello": "index"}).to_string());
}

#[tokio::test]
async fn fallback_response_dir_env_arg_overwrites() {
    let fallback_response_dir_path = "tests/fixtures";
    let test_setup = TestSetup {
        root_config_file_path: None,
        fallback_respond_dir_path: Some(fallback_response_dir_path.to_owned()),
        ..Default::default()
    };
    let port = test_setup.launch().await;

    let response = TestRequest::default("/", port).send().await;

    assert_eq!(response.status(), StatusCode::OK);

    assert_eq!(
        response.headers().get("content-type").unwrap(),
        "application/json"
    );

    let body_str = response_body_str(response).await;
    assert_eq!(
        body_str.as_str(),
        json!({"hello": "custom fallback respond dir"}).to_string()
    );
}

#[tokio::test]
async fn fallback_response_dir_env_arg_default() {
    let test_setup = TestSetup {
        root_config_file_path: None,
        fallback_respond_dir_path: None,
        ..Default::default()
    };
    let port = test_setup.launch().await;

    let response = TestRequest::default("/", port).send().await;

    assert_eq!(response.status(), StatusCode::NOT_FOUND);

    let response = TestRequest::default("/tests/fixtures", port).send().await;

    assert_eq!(response.status(), StatusCode::OK);
}

// RFC 049: the CLI front door. These exercise the real compiled binary
// (`Command`), not `TestSetup`, because the behaviour under test is
// `env::args()` parsing itself - `--version`/`--help` short-circuiting,
// exit codes, and stdout/stderr discipline all have to be observed from
// outside the process.

#[test]
fn unknown_option_exits_2_on_stderr_and_starts_no_server() {
    let output = bin()
        .args(["--bogus-flag-xyz"])
        .output()
        .expect("failed to run apimock");

    assert_eq!(output.status.code(), Some(2));
    assert!(output.stdout.is_empty(), "stdout was not empty");
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(
        stderr.contains("unknown option '--bogus-flag-xyz'"),
        "stderr was: {stderr}"
    );
    // No server started: `.output()` waits for the process to exit on
    // its own. A server that had (wrongly) started would never exit,
    // and this call would hang rather than return - the absence of a
    // hang is itself part of the evidence, not just the message text.
}

#[test]
fn unknown_option_near_match_suggests_the_correction() {
    let output = bin()
        .args(["--prot", "4000"])
        .output()
        .expect("failed to run apimock");

    assert_eq!(output.status.code(), Some(2));
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(
        stderr.contains("unknown option '--prot'; did you mean '--port'?"),
        "stderr was: {stderr}"
    );
}

#[test]
fn unknown_option_with_no_plausible_match_names_it_without_a_suggestion() {
    let output = bin()
        .args(["--zzzzzzzz"])
        .output()
        .expect("failed to run apimock");

    assert_eq!(output.status.code(), Some(2));
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(stderr.contains("unknown option '--zzzzzzzz'"), "{stderr}");
    assert!(!stderr.contains("did you mean"), "stderr was: {stderr}");
}

#[test]
fn version_and_help_normal_workspace() {
    for flag in ["--version", "--help"] {
        let output = bin()
            .current_dir(normal_workspace_dir())
            .args([flag])
            .output()
            .unwrap_or_else(|e| panic!("failed to run apimock {flag}: {e}"));

        assert_eq!(
            output.status.code(),
            Some(0),
            "{flag} in a normal workspace"
        );
        assert!(output.stderr.is_empty(), "{flag}: stderr was not empty");
        assert!(!output.stdout.is_empty(), "{flag}: stdout was empty");
    }
}

#[test]
fn version_and_help_no_config_file_present() {
    let dir = tempfile::tempdir().expect("failed to create temp dir");
    // deliberately no apimock.toml written

    for flag in ["--version", "--help"] {
        let output = bin()
            .current_dir(dir.path())
            .args([flag])
            .output()
            .unwrap_or_else(|e| panic!("failed to run apimock {flag}: {e}"));

        assert_eq!(output.status.code(), Some(0), "{flag} with no config file");
        assert!(output.stderr.is_empty(), "{flag}: stderr was not empty");
        assert!(!output.stdout.is_empty(), "{flag}: stdout was empty");
    }
}

#[test]
fn version_and_help_deliberately_invalid_config() {
    let dir = tempfile::tempdir().expect("failed to create temp dir");
    std::fs::write(
        dir.path().join("apimock.toml"),
        "this is not [[[ valid toml",
    )
    .expect("failed to write broken config");

    for flag in ["--version", "--help"] {
        let output = bin()
            .current_dir(dir.path())
            .args([flag])
            .output()
            .unwrap_or_else(|e| panic!("failed to run apimock {flag}: {e}"));

        assert_eq!(
            output.status.code(),
            Some(0),
            "{flag} with a broken config present"
        );
        assert!(output.stderr.is_empty(), "{flag}: stderr was not empty");
        assert!(!output.stdout.is_empty(), "{flag}: stdout was empty");
    }
}

#[test]
fn match_test_and_validate_help_are_reachable_per_subcommand() {
    for subcommand in ["match-test", "validate"] {
        let output = bin()
            .args([subcommand, "--help"])
            .output()
            .unwrap_or_else(|e| panic!("failed to run apimock {subcommand} --help: {e}"));

        assert_eq!(output.status.code(), Some(0), "{subcommand} --help");
        assert!(output.stderr.is_empty());
        let stdout = String::from_utf8_lossy(&output.stdout);
        assert!(
            stdout.contains(&format!("apimock {subcommand}")),
            "{subcommand} --help stdout was: {stdout}"
        );
    }
}

#[test]
fn bare_relative_config_resolves_the_same_as_dot_slash_prefixed() {
    let dir = tempfile::tempdir().expect("failed to create temp dir");
    std::fs::write(
        dir.path().join("apimock.toml"),
        "[listener]\nip_address = \"127.0.0.1\"\nport = 0\n",
    )
    .expect("failed to write config");

    for arg in ["apimock.toml", "./apimock.toml"] {
        // Config loading logs `[config] <path>` to stdout the moment it
        // succeeds (`config.rs`), before the listener binds - so instead
        // of a fixed sleep (the exact pattern RFC 046 just removed from
        // the test harness for the same reason: it's either too short
        // and flaky or too long and slow), poll for that line or for the
        // process exiting early, whichever happens first, up to a
        // bounded deadline.
        let mut child = bin()
            .current_dir(dir.path())
            .args(["-c", arg])
            .stdout(std::process::Stdio::piped())
            .stderr(std::process::Stdio::piped())
            .spawn()
            .unwrap_or_else(|e| panic!("failed to spawn apimock -c {arg}: {e}"));

        let mut stdout = std::io::BufReader::new(child.stdout.take().expect("piped stdout"));
        let (tx, rx) = std::sync::mpsc::channel();
        std::thread::spawn(move || {
            use std::io::BufRead;
            let mut line = String::new();
            let _ = stdout.read_line(&mut line);
            let _ = tx.send(line);
        });

        let saw_config_line = rx
            .recv_timeout(std::time::Duration::from_secs(5))
            .map(|line| line.starts_with("[config]"))
            .unwrap_or(false);

        let _ = child.kill();
        let output = child.wait_with_output().expect("failed to reap child");

        assert!(
            saw_config_line,
            "-c {arg}: never saw the `[config]` line - resolution likely failed; stderr: {}",
            String::from_utf8_lossy(&output.stderr)
        );
        assert!(
            !String::from_utf8_lossy(&output.stderr).contains("failed to resolve path"),
            "-c {arg}: stderr: {}",
            String::from_utf8_lossy(&output.stderr)
        );
    }
}

/// `-c` with nothing after it was already a meaningless invocation
/// before RFC 049 (`args_option_value` returns the empty string for a
/// value-flag given with no value, the same encoding it uses for a
/// boolean flag's presence) - the normalisation in
/// `normalize_bare_relative_path` must not turn "no path given" into
/// "path is `./`", which would trade one confusing error for a
/// different, more confusing one. Pins the exact pre-existing message.
#[test]
fn config_flag_with_no_value_fails_the_same_way_as_before() {
    let output = bin().args(["-c"]).output().expect("failed to run apimock");

    assert_eq!(output.status.code(), Some(1));
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(
        stderr.contains("config file specified via --config does not exist:"),
        "stderr was: {stderr}"
    );
    assert!(
        !stderr.contains("Is a directory"),
        "stderr was: {stderr} (this would mean the empty value got normalised to \"./\")"
    );
}

#[tokio::test]
async fn dir_flag_resolves_bare_and_dot_slash_identically() {
    // RFC 049 § 2 finding: `--dir` never shared `--config`'s resolution
    // fault. A CLI-supplied `--dir` overrides `fallback_respond_dir`
    // verbatim (`Config::compute_fallback_respond_dir`'s early return)
    // without going through the parent-dir resolution `--config` used
    // to hit, and it's read at request time via a plain `Path::join`
    // (`dyn_route.rs`), which treats a bare and a `./`-prefixed relative
    // path identically. `fallback_response_dir_env_arg_overwrites` above
    // already covers the bare form (`"tests/fixtures"`); this proves the
    // `./`-prefixed form serves the exact same fixture, so neither is
    // failing silently by accident.
    let test_setup = TestSetup {
        root_config_file_path: None,
        fallback_respond_dir_path: Some("./tests/fixtures".to_owned()),
        ..Default::default()
    };
    let port = test_setup.launch().await;

    let response = TestRequest::default("/", port).send().await;
    assert_eq!(response.status(), StatusCode::OK);

    let body_str = response_body_str(response).await;
    assert_eq!(
        body_str.as_str(),
        json!({"hello": "custom fallback respond dir"}).to_string()
    );
}